4 things that make up your BLOOD

1. Plasma (liquid stuff)

Ernest Wolfe
countdown.education
1 min readMar 28, 2017

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  • Plasma make up 55% of your blood’s volume
  • Plasma is made of 92% water
  • The other 8% contains proteins, nutrients, salts, enzymes, and other stuff your cells need
  • Its color is clear/off-white
  • Plasma is like the river that keeps all the other blood cells flowing throughout the body

2. Red Blood Cells (erythrocytes)

  • Red Blood Cells, or RBCs, make up 45% of your blood’s volume
  • RBCs are the most numerous cells in your blood
  • RBCs contain hemoglobin, a protein that carries oxygen to the cells and carbon dioxide waste away from cells

3. White Blood Cells (leukocytes)

  • White Blood Cells, or WBCs, make up about 1% of your blood’s volume
  • WBCs protect the body from invaders and infections disease
  • WBCs are formed in the bone marrow and only live for about a day
  • Leukemia (from ‘leukocyte’) is a type of cancer when your bone marrow produces malformed white blood cells that don’t do your job and prevent your blood from being healthy

4. Platelets (thrombocytes)

  • Platelets make up less than 1% of your blood’s volume
  • Platelets help form blood clots to repair tears in your arteries, veins, or capillaries
  • Not enough platelets = you bleed
  • Too many platelets = halts blood flow and can lead to stroke

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